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Finding the Fourth Proportional to 764.19, 1,146.60 and 456.21

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Solution

The fourth proportional to 764.19, 1,146.60 and 456.21 is: 684.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.19 : 1,146.60 = 456.21 : x
  2. Step 2: Convert to fraction form
    764.19/1,146.60 = 456.21/x
  3. Step 3: Cross multiply
    764.19x = 1,146.60 × 456.21
  4. Step 4: Simplify right side
    764.19x = 523,090.39
  5. Step 5: Solve for x
    x = 523,090.39/764.19
  6. Step 6: Final answer
    x = 684.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 765.19, 1,148.10 and 457.21
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.